By Austin Richards
Austin Richards takes readers on a visible journey of the electromagnetic spectrum past the diversity of human sight, utilizing imaging know-how because the potential to "see" invisible mild. Dozens of colourful photos and transparent, concise descriptions make this an interesting, available technical booklet. Richards explains the sunshine spectrum, together with noticeable mild, and describes the complicated imaging applied sciences that allow people to synthesize our personal model of "alien" imaginative and prescient at diversified wavelengths, with purposes starting from hearth combating and legislations enforcement to botany and medication.
the second one version expands current content material, explores contemporary components of study, and gives new illustrations that exhibit the variety of imaginative and prescient in the course of the spectrum
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Additional info for Alien Vision: Exploring the Electromagnetic Spectrum with Imaging Technology
This is probably an adaptation that helps male butterflies avoid trying to mate with other males. Ultraviolet vision is found in marine animals as well. The underwater world looks very different in the near-ultraviolet waveband. Particulates in ocean water can scatter near-UV light to such an extent that the water looks foggy, and consequently marine life is thrown into sharp relief against a background such as the coral reef shown in the left-hand image in Fig. 36. This is a visible image taken through a filter that passes green light.
The heat distorts the metal aerodynamic surfaces of the missile, making it unstable in flight and leading to its violent breakup. 22 Chapter 1 Ultraviolet Imaging The phenomena seen with ultraviolet imaging tend to be complimentary to phenomena seen with near-IR imaging. UV light has both higher-energy photons and shorter wavelengths relative to VIS and near-IR light. These two differences account for the very different appearance of many materials when imaged with UV, VIS and near-IR imaging systems.
These devices are known as image intensifiers, and they image with visible as well as near-IR light out to a wavelength of about 900 nm. This extended spectral sensitivity adds to the overall brightness of the scene due to the presence of near-IR night glow, and allows for the use of covert signaling devices used primarily in law enforcement applications. For example, there are commercially available miniature infrared beacons that can be attached to the roof of a vehicle and then tracked from the air by law enforcement with night-vision devices.